Nav station switches
From MITNA
- (return to Systems Description "12-v DC")
| POSITION | ACTION |
| UP | automatic: starts when a certain level is reached, stops when lower level reached |
| CENTER | off: pump never runs |
| DOWN | manual: pump runs whether or not there's water to pump |
- Notes (above):
- Do not let bilge pump run "dry"; when in DOWN position, turn switch to CENTER or UP when higher-pitch sound from pump indicates all water is pumped out.
- Pump is NOT fused in Nav Station switch panel; fuse is inline, bundled in Battery 1 wiring, in battery compartment behind nav table seat, AGC 15-amp.
| SWITCH | AMPS | CAPTION | OBSERVED FUNCTION |
|---|---|---|---|
| 1 | 30-A | MAIN | powers (12-V) upper 2-6, lower 1-6 switches |
| 2 | 10-A | NAVIG LIGHTS | believe lights these that Ted fixed (Aug-Sep07) |
| 3 | 10-A | STEAMING LIGHT | blows #3 CB after drawing > 50-A |
| 4 | 10-A | CABIN LIGHTS | not observed (Sep07) |
| 5 | 10-A | PRESSURE WATER | shows c. 5-A when pump runs |
| 6 | 10-A | BLOWER | (blower probably disconnected (Sep07)) |
| SWITCH | AMPS | CAPTION | OBSERVED FUNCTION |
|---|---|---|---|
| 1 | sw? | SUMP PUMP | unknown |
| 2 | sw? | FORE DECK ILLUM | blows CB (Sep07) |
| 3 | sw? | NAVIG INSTR | no observed change |
| 4 | sw? | MASTHEAD LIGHT | shows approx 2-amp, don't know what light goes on |
| 5 | sw? | RADIO | activates fixed VHF power |
| 6 | sw? | ACCESSORY | probably works, but passageway socket disconnected?) |
Note: in AMPS column above, "sw?" means that (Apr08) we saw no amperage rating on these
- switches, which may imply that they are switch-only devices, without a circuit breaker;
- in this case, they use the leftmost upper switch (#1) for over-current protection.
- TODO: spelunk further under the wiring pile for possible CB amperage values.
| SWITCH | AMPS | CAPTION | OBSERVED FUNCTION |
|---|---|---|---|
| 1 | SW | no caption | not wired up |
| 2 | 25-A | Auto Pilot | unknown |
| 3 | SW | REFRIGERATION | unknown |
| 4 | SW | STROBE | unknown |
| 5 | SW | ANCHOR | unknown? |
| 6 | ??-A | PHONE | unknown? (note: there's a "phone" shore conn.) |
| 7 | 05-A | RADAR | activates RADAR power (approx 3-amp warm-up) |
| 8 | 05-A | NAV/COM | (Thom's note says "no switch"??) |
NOTE: "SW" above indicates that we observed (Apr08) no marking on these
- switch units that they have a circuit-breaking function.
- We unfortunately seem to have lost track of the backs of the switches and
- what some of them are used for based on the panel markings: the bottom two units
- as seen from the back are 5-A CBs; we know that the bottom one is not connected;
- however, the table above says the next-to-bottom is for RADAR, but our notes
- say the next-to-bottom 5-amp CB seen on back of panel has its wires cut; unless
- Ted cut them when he took RADAR out c.Dec07, ThomS knows that the RADAR switch
- indeed worked with the RADAR when basic testing was done in 2007.
Right-hand sub-panel (NAV instruments):
(no info available yet (Sep07))
This unit controls meter illumination intensity in Nav instruments; it may also control turning them on and off. (ThomS has notes on wiring, but can't locate it Apr08.)
